Machine for bending armature conductors



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Nov. 6, 1928. 1,690,336

G. w. ELsEY MACHINE FOR BENDING ARMATURE CONDUCTORS Filed Dec. 22, 1925 7 Sheets-Sheet 2 Nov. 6, 1928.

G. W. ELSEY MACHINE FOR BENDING ARMATURE CONDUCTORS Filed Dec. 22, 1925 '7 Sheets-Sheet 3 m AH IIIA Irl Nov. 6, 1928. 1,690,336

- G. w. ELSEY MACHINE FOR BENDING ARMATURE CONDUCTORS Filed Dec. 22, 1925 7 Sheets-Sheet 4 '7 Sheets-Sheet Nov. 6, 1928.

G. W. ELSEY MACHINE FOR BENDING ARMATURE CONDUCTORS Filed Deo. 22, 1925 Nov. 6, 1928.

G. W. ELSEY MACHINE FOR BENDING ARMATURE CONDUCTORS v sheets-sheet 6 Filed Dec. 22, 1925 Patented Nov. 6, 1928.

UNITED STATES PATENT OFFICE.

GEORGE W. ELSEY, OF ANDERSON', INDIANA, ASSIGNOR, BY MESNE ASSIGNMENTS, 'lO

DELCO-BEMY CORPORATION, F DAYTON, OHIO, A CORPORATION 0F MACHINE FOR BENDING Application led December vThis invention relates to the manufacture of armatures for dynamo electric machines and more particularly to armatures having bar windings such as the armatures or series motors used for starting internal-combustion engines. In the manufacture of bar-wound armatures it has been the practice to provide single turn bar windings commonly known as hairpinsx7 having parallel branches which are placed in spaced slots on the armature core by moving the hairpin cndwise through the slots. Each slot of thearmature core will contain a portion of one hairpin and a portion of another hairpin, one portion being located nearer the periphery of the core than the other. All of the hairpin conductors are assembled upon the armature core and thev ends of these conductors which project beyond one side of the core are displaced angularly from the slots from which the conductors emerge so that the ends of the branches of the hairpins will be located respectively in alignmentwith certain risers of a commutator through which. the ends of the branches are respectively connected in order to make the proper connections between the commutator and the armature windings. The inner cir- Ilular row of armature leads are then angularly displaced in one direction relative to the armature shaft, and the conductor leads which are in the outer circular row are displaced in the opposite direction.

One of the objects of the present invention is to facilitate the work of bending the armature conductor leads in order to reduce the cost of this part of the manufacture of the armature. In order to accom lish this object, the present invention provi es a machine comprisingr bending members which are rotated in opposite directions and are adapted to receive, respectively, the armature leads which are located in the outer circular row and the inner circular row, a

, work holder for re^eiving an armature to be operated upon, devices enganfeable with the conductors adjacent the core for limiting the abruptness of the bending of the armature conductor leads when they emerge from the core and a control apparatus having a single manually operable member which, when moved in a certain position, will automatically cause the Work holder to advance toward the bending members, said conductor engaging devices to advance toward the con- ARMAT'URE CONDUCTORS.

22, 1925. Serial No. 76,974.

ing members and the bending members to be returned to normal positlon ready for operation upon another armature.

A further object of the invention is to provide a machine of the type described which is adapted to be attached to the horizontal bed of a conventional type of punch press, and having mechanism for operating the bending members constructed and arranged to be operated by the vertically reciprocating head of the punch press.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings wherein a preferred form of embodiment of the present invention is clearly shown.

In the drawings:

Fig. 1 is a side view of an armature which is manufactured with the aid of the machine embodyin the present invention.

Fig. 2 1s an end view of said machine.

Fig. 3 is a view partly `in longitudinal section of the machine, the work holder and armature being retracted from the bending members.

Fig. 4 is a fragmentary end view of the mechanism for operating the bending members, this view being partly in section on the line 4--4 of Fig. 3.

Fie. 5 is a plan view of the bending members one of which has been broken away for sake, of clearness.

Fig. 6 is a plan view of the outer bendving member.

Fig. 7 is a fragmentary end view of the inner bending member looking in the direction of arrow 7 of Fig. 5.

Fie'. 8 is a fragmentary end view looking 1n the same direction as the end view shown in Fig. 7, but showing the relation between both of the bending members.

F ig. 9 is a fragmentary View partly in section showing the forming slides in engagement with the conductors.

Fig. 10 is a fragmentary longitudinal sectional view of the bending devices and forming slides prior to the bending operation.

Fig. 11 is a view similar to Fig. 10 showing the position of the bending members after the bending operation and rior to the disengagement of the armature from the bending members.

Fig. 12 is a plan view of a portion of the operating mechanism and a plan view of a portion of the control mechanism. Y

Figs. 13 and 14 are side views looking in the direction of arrow 13 of Fig. l2 of the control mechanism in Fig. 12. These views show the mechanism in two different positions of operation.

Fig. 15 is a fragmentary view showing a portion of the control mechanism in position of operation intermediate the positions shown in Figs. 13 and 14.

Figs. 16 and 17 are diagrammatic views showing the compressed aii fluid system and control therefor for operating certain inechanisnis of the machine. These figures show the control system and certain parts of the machine in two positions of operation.

Referring to Fig. 1 which shows the tvpe of armature to which the present invention pertains, 20 designates the armature shaft, 21 the coie. and 22 one of the hairpin or single turn bar conductors. Each slot of the armature core contains branch 23 of one con ductor and branch 24 of another conductor. As indicated bv the dot and dash lines ot Fig. 1, conductors usually emerge in paraflelism from the core 21. The outer conductors 23 are located in an outer circular row and the conductors Q4 in an inner circular row. The function of the machine which is about to be described is to bend the ends of the outer row of condiictoi leads Q3 into the positions indicated in full lines in Fig. 1 and designated b v the numeral 23"; and to bend the inner row of conductor leads into the. positions shown in dotted lines and dcsignated by the numeral 24".

As stated before, the machine comprises a bending mechanism for receiving the ends of the armature conductor leads and for bending them away from the radial planes of the core slots from which these conductors emerge; devices for engaging the conductor leads to limit the abriiptness of curvature thereof when the leads emerge from the core; a work handling device; and a control mechanism which is set in motion b v the operation of a manually movable member and which functions to effect the operation of these mechanisms in a predetermined sequence. These principal parts of the inachine will be described in the order mentioned.

Bending mechanism.

Referring first to Fig. 5 the bending mechanism comprises a tubular member il() having a flange Ill provided with a plurality of radial notches 32 which define a plurality of' Lacasse radial extending fingers 33 which are beveled as indicated b v numeral 34 in Figs. 8 and 5. Each notch 552 is intended to receive the end of one ofthe conductor leads which is located in the inner circular row referred to, for example, one ot the conductor leads 2t shown in Fig. l. A tubular bending member surrounds the member 3l) and is provided with a plurality of spaced fines 3G which are beveled at. 3i' as clearly shown in Figs. G and 8. Each .space 88 between the adjacent tines 36 is intended to receive an end of the conductor leads in the outer row of' conduc tors, for example, one ot the conductor leads Q3 shown in Fig. l.

rl`he bending member '35 is mounted for rotation in bear'ng t0 which is supported by frame 41 of the 'machine This frame is ada `)ted to be supported by the die-supportiiigiied of a conventional punch press having a vertically reciprocating head to which a punch mab7 be attached. The tubular member 55 provides a bearing for the inner bending member titl. The flange 31 of the member Il() overlies the adjacent end of the meinbei' 35 so thatI relative movement between these members is prevented in one direction. A lever 42 is attached to the member 35, and a lever 43 to the member 30. The right hand end of' the member 30 is provided with a threaded portion Ltlv for receiving a mit: 45 which clamps the lever 43 againstl a .shoulder 4G provided by the member ft). Thus the lever 42 is confined between a shoulder t7 provided bv thc member 35 and the lever Ii3. .lt is therefor? apparent that cndwse movement ofthe member Ilsi will produce endwise movement of' the member 30 in either direction. Endwise movement of the members il() and 35 is produced in response to the rotation of member 35 b v means which includes a pin 5t) tbreadedly engaging thil frame 11 and extending through :i hole in the bearing fit) and into a spiral slot 51 provided iii the member 35 as shown in Fig. t. The relation of' the cam slot to the pin is indicated in Fig. (i. the circle in dot and dash lines represent ing the pin 50. lt is therefore obvious that if the member .'l be turned in a counterclockwse direction as viewed in Fig. 2 or iisl viewed from the leftl of Fig. il, both bending members will approach the armature core. This feature is necessary since the distance between the ends of the armature conductors and the core diminishes as the extent of angular displacement of the conductor ends lllCVHSF.

The levers 42 and 43 are engaged bv blocks 52 and 53, respectively, which arie carried b v a volte 54 attached to a sbanlir ."15 which is adapted to be attached to thi,I head of a punch press of the tvpe referred to. Obviously. downward movement of thc punch press bead will cause said levers to move downwardt)v and the members 2ST aud llt) 30 to be rotated countercloekwise and clockwise, respectively, as viewed in Fig. 1 and in the direction of the arrow 51 as viewed in Fig. 3. When the punch press bead moves upwardly the levers 42 and 43 are returned to normal position by springs 56 and 57,113- spectively, which are connect-ed respectively with said levers and with stationary studs 58 and 59` respectively.

A. ring 48 surrounds tines 3G of the member 5&5 and a. ring 4.9 separates said tines Jfrom the lingers` 3l of the member 30.

(fondi/cto?" engaging devices.

The devices which are engaged by the arlnaturc conductor leads while being bent to limit the al'iruptness et curvature of the leads ad'acent the core 2l comprise a plurality ot sliding bars 60 each received by a radially extending groove 61 provided by a circularguide block 62 which is located within a cylindrical recess 63 provided by the frame 41. A doivel pin telmaintainsthe guide block 62 in a desired position angularl v relative to the bending members. The slides 60 are actuated by a rotatable cam plate 65 having a plurality of oblique slots (30 each for receiving a pin 6T attached to one of the slides 60. The cam plate G5 is provided with a journal 68 which is received within the recess 63, tbe cylindrical -vvall of which provides a bearing; 'tor the journal 68. The plate 65 is retained by screws G9 threadedly engaging the frame 4l and extending through slots 70 which provide tor movement ot the plate 65 relative to the frame. lVben the plate. 65 is in the. position shown in Figs. 2 and 3. the slides will be retracted to the greatest extent from the axis of the armature so as to permit the armature conductor leads 22a and 2i to be introduced through the central apertures 71 and 72 provided by the plate G5 and the block G2, so that these leads may be received by tbe recesses 38 and 32 provided by the bending members as shown in Fig. 8. lVhen the plate G5 is rotated counterclockvvise from the position sbovvn in Fig. 2 to the position shown in Fig. 9. the slides will' be moved inwardly between the conductor leads to provide curved forms (shown more clearly in Figs. 1. 10 and 11) about which the leads are bent. These slides prevent bending the leads so sharply as to injure `the core insulation, which injury might result in grounding a conductor. Before the armature is retracted trom the bending members as shown in Fig. 11` the slides ($0 are retracted by movement ot the plate ($5 in a clockwise direction as viewed in Figs. 2 and 9.

The cam plate 05 is actuated b v a fluid pressure device. which includes a cylinder 90 shown in side elevation in Fig. 2 and dia` grammatically in Fig. .16, and a piston S1 reeiprocable within the cylinder and connected with the plate 65 by piston rod 82 and a lever S3 integral with said plate. Vhen compressed air is admitted between the pistou 81 and the stuiing box end 80 ot' the cylinder. the piston will be moved downwardly toward the. head end thereby causing the slides (i0 to move inwardly from the vosition shown in Fig. 16 to the position siown in Fier. 17. Admission of compressed air at the bead end ot the. cylinder Will effect the opposite movement.

lVorc handling 'mecha-'niacin rlhe.mechanism for receiving the armature to be operated upon and tor carrying it to the bending mechanism and forming devices comprises an armature support 90 providing a cradle 91 having a cylindrical suri'aee tor receiving` the cylindrical armature core 21. The support 90 carries backing plate 92 which is adapted to engage the vokes of the hairpin conductors 22. The backing plate 92 is provided with a tubular shank 93 which is received b v a notch 94 provided in the bracket 93 of the armature support. The tubular shank 93 receives one end of the armature shattQO which is located in alignuient with the central bore 39 of the bending` member 30. The armature support 90 is non-rotatably supported by a rod 100 which is slidable endvvise through bearings 101 and V102 provided by the frame 11. A. bracket 103 is nen-rotatably supported by tbe rod 100 and supports a knock-ont rod 1041 slidable through the central bore R9 ot' the member 90. 'Ibe pur pose ot the rod 1041 is to engage the armature shalt Q0 in case the armature should tend to remain in engagement with the members 30 and 35 as shown in Fig. 11. 'lhe rod 100 is actuated by a lluid pressure device which includes an air cylinder 105 within which a piston 106 reciprocates. as shown, diagrammatically in Fig. 1G The piston 10Gis connected by a piston rod 107 and a volte 108 with the rod 100. lVhen fluid pressure is admitted between the piston 100 and the stuilingj box end 105? ot the cylinder 105, the piston will be moved tovvard the right as viewed in Fig. 16 thus causing the Work holder to be moved to ward the right trom the position shown in Fig. 3 to the position shown in Fig. 10. lVhen con'ipressed air is admitted to tbebead end 105b ot tbe cylinder. the work support will be returned to position for unloading the work and re-loadine.

Uri/afrol mechanism.

The control meclmnisui 'for controlling the operation ot the punch press which operates the bending members, and tor controb ling the admission of cou'ipressed air to the pressure cylinders 80 and 105, includes a single manually operated lever which is connected with a shaft 111 supported by brackets 112 integral with a horizontal plate 113 which is attached in a manner to be described to a plate 114 attached to the trame 41. The shaft. 111 is connected with a hub 115 from which extends lingers 11G and 11T adapted to engage respectively with levers 118 and 119 pivoted at 120 and 121, respectively. Lever 118 engages the upper end 0f a valve stem 122, and lever 119 engages the upper end of a valve stem 122. The valve body 123 provides a common air inle. passage 124 having branches 125 and 125l which may be placed in communication with chambers 126 and 126a by the opening et ports 127 and 12T, respectively. These ports are normally closed by valves 128 and 128n which are maintained on their seats by springs 129 and 129, respectively. The chambers 126 and 126 are normally placed in communication by ports 130 and 130"l with exhaust: ports 131 and 131, respectively. The ports 130 and 180 may be closed by valves 132 and 132". respectively. The valve stem 122 is connected with the valves 128 and 132 and extends through a stutling box 133 the exterior ot' which is threaded to receive a nut 134 by which theI bracket member 113 and the plate 114- are clamped against the upper surface ot the valve bod v 123. In this manner the valve body and bracket are Isecured to the base 141. Likewise the valve stem 122a is connected with the valves 128a and 132n and extends through exteriorly threaded stutling box 133e; and a mit 134"A clamps the bracket member 113 and the plate 114 between said nut and the upper surface of the valve body 123.

Ott position of lever 110 is indicated b v the dotted line position 110 shown in Fig. 11i. To start the machine into operation after an armature has been placed upon the arinatnre support 90, the lever 110 is moved to the position shown in full lines in Fig. 16 for the purpose of admitting air in the stutting box ends of the cylinders 80 and 10.5. ltlovenient of the lever 11() into this position will canse the finger 117 to engage the lever 119 and the latter to move the valve .stem 122-'L downwardly in order to close exhaust port. 130a and to open the air port 127". Compressed air will then llow rom air inlet passage 121. through passage 12:7, port 127, pipe litt) to the stulling box end ot thel cylinder' 105; and through a branch pipe 1111 through a valve 1-12 which is then norn'ially closed and thus prevents the passage ot' compressed ail from the pipe 141 into the pipe 143 which is connected with the stuffing box end of the cylinder 80. The valve 142 contains valve members and passages similar to the described parts within the valve body 123. The movement of the valve stein 144- toward the right will permit air to flow from the pipe 1-1-1 to the pipe 143, but when the valve .stem 14-1 is in the position shown in Fig. 11i. communication between the pipes 141 and 143 is interrupted. Admission of compressed air to the stntling box end of the cylinder 10.3 will cause the piston 106 to move toward the right into the position shown In Fig. 1T. This will cause the work carrier .(10 to move from the position shown in Fig. 21 to the position shown in Fig. 1t). During the movement ot the carrier into this position, a part. moved by rod 10T, such as an arm 116 projecting troni the worlv carrier tltly will engage the valve stem ll-l and move the same into the position shown in Fig. 1T, thereby connecting pipe 141 with the pipe 143 and disconnecting the pipe 148 from the exhaust passage 115. This operation of the valve 142 will cause compressed air to tlow into the stntting box end of the cylinder 8() thereby causing the piston 81 to move from the position shown in Fig. 113 to the position shown in Fig. 1T in order to move the slides G0 against the work as previously described.

The movement. of the lever 111) into the full line positionr` shown in Fig. 151. will cause a latch rod 15() connected willi lever 110 to be moved into the position shown in Fig. 13. As the rod is moved toward 'the left. the right hand end ot the rod will move to the left ot' a lever 1:31 which is pivotally supported by a pin 1:32 carried b v bracket 153 attached to the base 11. 'l`bc end 15st ol the lever is vicldingly urged into the path ot movement ot the rod l5() bv :i spring 155. Therefore as soon :is the right hand end ot rod 1:70 moves away trom the lever 151. this lever will be moved into the position shown in Figs. 2 and 1; in order to prevent movement ot the rod litl toward the right. thus resisting the action ot' a spring 1513 which is attached to a .stationanv stud 157 and to the lever 1111. l`hcrct'ore the lever 11() will be positivelyy maintained in this position of operation until the lever 151 is moved counterclockwise as viewed in Fig. 2 to release the rod 1:10. 'l`he movi-- ment ot the lever 151 is controlled however b v the mechanism which operates th'.x bending members so that the work carriage and clamping device must remain in the position shown in Figs. 1t) and 11 until alter the, bending opi-ration luis been completi-d. 'lhe lever 151 is moved to release thiI rod 150 by :i vertically movable rod ltll which is attached to the tvolte 1511. Near the end ot theI downward n'iovenient ot' thi` voke 151 the rod 11i() engages the lever 151 so that the bending operation is completed bv thc, time the lever 151 has been moved into the position for releasing the rod 151).

The downward movement of thc pnncli press head which causes the downward Utl movement of the member 154 and rod 1.60, is effected throu h the control of the conventional type o punch press clutch which is known as the sliding pin type. As the construction of a sliding pin clutch is well known to those skilled in the art it has not been illustratedy and described. It will be understood, however, that when a clutch opera-ting rod 161 shown in Figs. 13 and 14 is moved downwardly the clutch pin will be released so as to connect the punch press shaft with a source of power. As well known. the punch press shaft includes a crank or eccentric which causes the punch press head to move downwardly and then upwardly again. If the clutch operating rod 161 is released after the punch press shaft has made a partial revolution, the clutch pin of the punch press will be withdrawn automatically near the end of one revolution of the punch press crank so that the punch press crank will come to rest in upper dead center position. In other words, downward movement of the rod 161 will start vthe punch press into operation; but, if this rod is released before the end of the cycle of punch press operation, then the cyclewill not be repeated and the piuich press will stop after one operation.

The rod 161 is moved downwardly automatically in response to the movement of the piston rod 107 toward the right from the position shown in Fig. 12. This motion of the piston rod causes the yoke 108 to move toward the rod and to Carr with it a latch lover 162 which is pivotaliy supported by screw 163 attached "to yoke 108. The lever 162 is received by a notch 164 provided by the yoke 108 and is maintained in the position shown in Fig. 13, by spring 165 which is located between the arm 166 of the lever 162. and that portion of the yoke which defines the notch 164 and which is located be low the screw 163. The lever 162 is pro vided with a shoulder portion 167 which is adapted to engage the end 168 ot a rod 169 which is slidable through the bracket 153 and connected with the vertical movable rod 161 by a lever 170, a lever hub 171 and a lever 172. The lever hub is supported by a stud 173 which is carried in any convenient manner by the frame ot' the machine. As the lever 162 moves toward the right, the

, shoulder 167 will engage the rod end 168 in order to move therod 169 toward the right and the rod 161 downwardly to trip the clutch of the punch press. Further inovenu-nt of the lever 162 toward the right wll cause the lover arm 166' to engage the trip plate 174 attached by screw 175 to the machine frame 41. By the time the piston rod 107 has reached its limit of travel toward the right, lever 162 will have been moved into the position shown in Fig. 14 so that the rods 169 and 161 are released and are restored automatically to the position shown in Fig. 13 by the operation of a spring 176.

As already explained, this movement of the rod 161 will cause the punch press to perform one cycle of operation and then stop. This operation of the punch press will cause lthe yoke 54 to move downwardly to operate the bending devices as previously described. Downward movement of the yoke 54 carries the rod 160 downwardly in order to move the lever 151 into a posit-ion to release the rod 150 and to cause the spring 156 to move the lever 110 into the position shown in full lines in Figs. 14 and 17.

When the lever 110 is in the position shown in Fig. 17 the valve operating lever 119 is released and the operating lever 118 is pressed downwardly in order that the valve port 127 will be opened, the valve port 130 closed, the valve port 127*1 closed and the valve port 120EL opened. This operation ot' the valves will cause air to iiow from the air inlet passage 124through the valve port 127, chamber 126 and thence through pipes 1.80 and 181 into the head ends of the cylinders and 105, respectively. This will cause the piston 81 to move upwardly and the piston 106 to move toward the left in order to retract the forming devices from the work and to move the work carriage into normal position in which the armature can be conveniently removed. While the pistons are moving in the direction mentioned, air will be exhausted from the stuliing box ends of the cylinders through the pipes 143, 141 and 140 and exhaust ports 131a and 145, respectively, of the valves 123 and 142. Movement of the work carrier toward the left will retract the arm 146 from the valve stem 144 in order to restore the valve mechanism within the valve 142 to normal position whereby the port connecting the pipes 141 and 143 is closed and the port connecting the pipe 143 and the exhaust passage 145 is open.

From the foregoing description of the bending device and its mode of operation, it is apparent that the operator has only to place the work upon the work carrier as shown in Fig. 13 and then release the lever 110. The work is moved automatically toward the bending members and the forming devices are applied to the work. The bending operation is performed, then the form ing devices are. retracted from the Work and the work carrier moves the work back into the position for unloading. All these o 3erations are carried on automatically. t is therelore apparent that the work otf bending armature conductor leads has been facili-` tated and the cost of this part of the manufacture of bar wound armatures has been materially reduced.

lWhile the form of embodiment of the present invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted, all comine' within the scope of the claims which follow.

W hat is claimed is as follows:

l. Apparatus for bending armature conductor leads, comprising in combination, a work carrier for receivin r an assembly of an armature core and condiictors, the ends of which extend beyond one end of the core to provide leads, bending mechanism for receiving the leads and displacing them singularly relative to the core and means for advancaig the carrier toward the bending mechanism, and for automatically retracting the \vork carrier from the bending mechanism after the bending operation, and means for operating the bending mechanism.

Q. Apparatus for bending armature conductor leads, comprising in combination, a work carrier for receiving an assembly of an armature core and conductors, the ends of which extend beyond one end of the core to provide leads, bending mechanism for receiving the leads and displacing them angularly relative to the core, power means for operating the work carrier, and control means manually oierated for causing the power means to advance the work carrier toward the bending mechanism, and automatically operated by the bending mechanism to cause the power means to retract the work carrier after the bending operation.

3. Apparatus for bending armature conductor leads, comprising in combination, a work carrier for receiving an assembly ot an armature core and conductors, the ends of which extend beyond one end of the core to provide leads, bending mechanism for receiving the leads and displacingr them angularly relative to the core, power means for operating the work carrier. power means for operating the bending mechanism, and control means manually operated for causing the carrier operating means t0 advance the carrier toward the bending mechanism, then causing the bending mechanism to be operated, and then causing the carrier operating means to retract the carrier.

4. Apparatus for bending armature conductor leads, comprising in combination. a work carrier for receiving an assembly of an armature core and conductors, the ends of which extend beyond one end of the core to provide leads, bending mechanism for receiving the leads and displacingr them angularly relative to the core, power means for operating the bending mechanism. means for moving the work carrier toward the bending mechanism, and control mechanism for automatically causing the bending mechanism to operate after the work carrier has been advanced.

5. Apparatus for bending armature conductor leads, comprising in combination, a

work carrier for receiving an assembly of au armature core and conductors, the ends of which extend beyond one end of the core to provide leads, bending mechanism for receiving the leads and displacing them angularly relative to the core. power means for operating the work carrier, power means for operating the bending mechanism, and control mechanism `l'or automatically causing the bendingmechanism to operate a tter the work carrier has been advanced and for causing the work carrier to be retracted after the bending operation.

t5. Apparatus for bending armature conductor leads, comprising in combination, a work carrier for receiving an assembly otan armature core and conductors, the ends of which extend beyond one end of the core to provide leads, bending mechanism Afor receiving the leads and displacing them angularly relative to the core, devices Afor engaging the conductors adjacent thel core, means for advancing the work carrier toward the bending mechanism, means for advancingr said devices toward said conductors auton'iatically in response to movement of thc work carrier` and means for operating the bending mechanism.

7. Apparatus tor bending armature conductor leads. comlnising in combination. a work carrier for receiving an assembly ol' an armature core and conductors. the ends of which extend beyond one end of thc core to provide leads, bending I'nechanism for receiving the leads and displacing them angularly relative to the core, devices t'or engaging the conductors adjacent the core, means t'or advancing and retracting said devices relative to the conductors, means tor retracting thc work carrier from the bending mechanism automatically in response to the retraction of said devices, and means for operating the bending mechanism.

ts". Apparatus lor bending armature con dnctor leads, comprising in combination. a work carrier for receiving an assembly of an armature core and conductors. the endsof which extend beyond one end of the core. to provide leads, bending mechanism for rcceiving the leads and displacing them anglilarly relative to the core, devices for engaging the conductors adjacent the core, means tor advancing and rctracting the work carrier relative to the bending mechanism` means for advancing and ret racting said devices relative to the conductors. control means for causing said devices to be advanced automatically in response to the advancing of the work carrier. and the work carrier to be retracted automatically in response to the retraction ot said devices. and means for operating the bending mechanism.

9. Apparatus for bending armature conductor leads comprising, in combination, a

lll-i lili Work carrier for receiving an assembly of an armature core and conductors, the ends of which extend beyond one end of the core to provide leads, bending mechanism for receiving the leads and displacing them angularly relative to the core, devices for engagingr the conductors adjacent the core, means for advancing and retracting the work carrier relative to the bending mechanism, means for moving said devices toward the conductors, and means for effecting operation of bending mechanism automatically after movement of the work carrier toward the bending mechanism and after movement of said devices toward the conductors.

10. Apparatus for bending armature conductor leads comprising, in combination, a

Work carrier for receiving an assembly of an armature core and conductors, the ends of which extend beyond one end ot' the core to provide leads, bending mechanism for rcceiving the leads and displacing them angie larly relative to the core, devices for engaging the conductors adjacent the core, means f for affecting operation of the bending mechanism automatically after movement of said devices toward the conductors.

1l. Apparatus for bending armature conductor leads, comprising in combination, a work carrier for receiving an assembly ot an armature core and conductors, the ends of which extend beyond one end ot the core to provide leads, bending mechanism for receiving the leads and displacing them angulari),l relative tofthe core` devices t'or engaging the conductors adjacent the core, means for operating the bending mechanism, means for advancing and retracting said de vices relative to the conductors, means causing the devices to be retracted automatically after the bending operation, and means for reti-acting the work carrier.

12. Apparatus for bending armature conductor leads, comprising in combination, a Work carrier for receiving an assembly oliI an armature core and conductors, the ends ot' which extend beyond one end of the core to provide leads, bending mechanism for receiving the leads and displacing them angularly .relative to the core, devices for engaging the conductors adjacent the core, means for advancing and retracting the Work carricr relative to the bending mechanism, means for operating the bending mechanism, means for advancing and retracting said devices relative to the conductors, means cansing the devices to be ret 'acted automatically and the. Work carrier'to be retracted autoinatically atfter the bending operation.

ceiving the leads and displacing them angularly relative to the core, devices for engaging the conductors adjacent the core, power operated apparatuses respectively for causing the work carrier to be moved relative to the bending mechanism for causing said devices to be moved relative to said conductors, and for operating the bending members, and control mechanism for said apparatuses for causing the carrier to advance toward the bending mechanism, then said devices to advance toward the conductorsand then the bending members to operate.

14. pparatus 'l'or bending armature conductor leads, comprising in combination, a Work carrier for receiving an assembly of an armature core and conductors, the ends of which extend beyond one end of the core t0 provide leads, bendinir mechanism for receiving the leads and displacing them angularly relative to the core, devices for engaging the conductors adjacent the core, power operated apparatuses respectively for causing the Work carrier to be moved relative to the bending mechanism, for causing said devices to be moved relative to said conductors, and i'or operating the bending mem-` bers, and control mechanism :l'or said apparatuses for effecting the advance of the carrier toward the bending mechanism and the. advance ot' said devices tovard the conductors, and eliecting the bending operation only atter the advance ot' the carrier and said devices.

15. Apparatus for bending armature conductor leads, comprising in combination, a work carrier :t'or receiving an assembly olE an armature core and conductors, the ends of which extend beyond one end ol the core to provide leads, bending mechanism for receiving the leads and displacing them angulariy relative to the core, devices for engaging the conductors adjacent the core, power operated apparatuses respectively for causing the Work 'arrier to be moved relative to the bending mechanism, for causing said devices to be moved relative to said conductors, and control mechanism for said apparatuses, for effecting the advance of the carrier toward the bending mechanism and the ad Vance of said devices toward the conductors, and eii'ecting the bending operation only after the advance ot the carrier and said devices, and then eil'ecting the retraction of the work carrier and said devices only ai'tcr the bending operation.

16. Apparatus for bending arina'turf` conductor leads, comprising in combination. a work carrier i'or receiving an assembly ot an armatme coreI and comlnctors. the end",l ol which extend beyond one end ol the core to provide leads, bending mechanism for receiving the leads and displacing them angularly relative lto the core, devices for engaging the conductors adjacent the core, power flu lll') ISO tltl

operated apparatuses respectively for causing the vvorlt carrier to be moved relative to the bending mechanism, tor causing said devicesl to be moved relative to lsaid conductors, and for operating the bending membeiwz, and controll mechanism for said apparatuses l'or causing automatically, in the following sequence` the advance ot' the work carrier tovvard the bending mechanism, the advance o t said devices toward the conductors, the bendingl operation, the retraction of said devicesI from the conductors, and the retraction ol the work carrier from the bending mechanism.

17. Apparatus for bending armature conductor leads, comprising in combination. a work carrier for receiving an assembly ot an armature core and conductors, the ends ot which extend beyond one end ot the core to provide leads, bendin mechanism Vl'or receiving the leads and cisplacing them angularly relative to the core, povver operated apparatuses respectively for causing the work carrier to be moved relative to the bending mechanism, and for operating the bending mechanism, and control mechanism for said apparatuses for causing automatically, in the following sequence, the advance of the work carrier toward the bending mechanism, the bending operation, and the retraction ot' the carrier from said mechanism.

ttt. Apparatus for bending armature conductor leads comprising, in combination, bending mechanism for receiving the conductor leads which emerge from an 'enfl ot the armature core and tor displacing them angularly relative to the core, devices l'or engaging the conductors adjacent the core, power operated apparatuses respectively tor operating the bending mechanism and for moving said devices relative to the conductors, and control mechanism for said a paratuses for causing automatically, in t 1e following sequence, the advance of said devices toward the bending mechanism, the bending operation, and the retraction of said devices from the conductors.

lf). Apparatus for bending armature conductor leads con'iprising, the combination, bending mechanism for receiving the conductor leads which emerge from an end of the armature core and tor displacing them angularly relative to the core, devices t'or engaging the condnet,:n's adjacent. thenrre, means or moving said devices relative to the conductors, and means for operating the bending mechanism automatically in response to the advancing of said devices toward the conductors.

Q0. Apparatus for bending armature conductor leads, comprising in combination, a vvorl; carrier for receiving an assembly of an armature core and conductorsr the ends of which extend beyond one end of the core to provide leads, bending mechanism for receiving the leads and displacing them angularly relative to the core, means for moving the carrier relative to the bcndin(r mechanism and means for operating the bending mechanism automatically in response to the advancing ol the carrier toward the bending mechanism.

2l. Apparatus tor bending armature con ductor leads comprising, in combination, a tubular frame providing a recess for receiving an assembly of a slotted core and hairpin conductors, rotatable bending members supported by the lrame coaxially` of said recess and having means t'or receiving the ends otA the conductors, means for engaging the conductors adjacent the core during the bending operation and including radially movable slides guided by radial grooves in one end face olf the trame, a cover plate for said grooves and slides rotatably supported by the traine and provided with cumming grooves oblique to said radial grooves, and pins attached to the slides and each received by one of the grooves in the cover plate.

Apparatus,v tor bending armature conductors comprising, in combination, bending mcclninism for receiving the conductor leads ot` hairpin conductors which emerge trom an end ot' thc arn'iature core and for bending them relative to the core, and a work support including a cradle for laterally sup porting the armature core, and means attached to the cradle for longitudinally cngaging the yolres olf the hairpin conductors, and means t'or moving the cradle relative to the bending mechanism.

23. Apparatus for bending armature conductors` comprising, in combination, a work carrier tor receiving an assembly of armature core and hairpin conductors the ends of which extend beyond one end ol the core to provide leads, bending mechanism l'or receiving the leads and displacing them relative to the core, a tluid pressure apparatus for moving the carrier relative to the bending mechanism, power means for operating the bending mechanism, means tor controlling the tluid pressure apparatus and including valves and an operating handleand a spring normally holding the handle in position i'or causing the pressure apparatuses to maintain the carrier retracted trom the hend ing mechanism. latch means released by movement ot' the handle into position for causing the carrier to be advanced toward the bending mechanism, said latch holding the handle in said position in opposition to said spring, means responsive to the advanc ing ot' the carrier for causing the power means to operate the bending mechanism, and means responsive to operation of the power means Vtor tripping the latch means to release said spring in order to restore the llO control means to normal condition whereby the carrier will be retracted from the bending mechanism.

24. Apparatus for bending armature conductors comprising` in combination, a work support for supporting an assembly of armature and hairpin conductors, the ends ot which extend beyond one end of the core t0 provide leads, bending mechanism for receiving the leads and displacing them relative to the core, devices engageable with the conductors `adjacent the core, fluid pressure apparatus for vmoving said devices relative to said conductors, power means for operating the bending mechanism, means for conl trolling the fluid pressure apparatus and including valves and an operating handle and a spring normally holding the handle in position to cause the pressure apparatus to maintain said devices retracted from the conductors, latch means released by movement of the handle into position Jfor causing said devices to be advanced toward the bending mechanism, said latch holding the handle in said osition in opposition to said spring, means or causing the power means to operate the bending mechanism automatically after said devices have advanced, and means responsive to the operation of t-he power means for tripping the latch means to release said spring in order to restore the control means to normal condition whereby said devices will be retracted from the work.

25. Apparatus for bending armature conductors comprising, in combination, a work carrier for receiving an assembly of armature core and hairpin conductors, the ends of which extend beyond one end of the core to provide leads, bending mechanism for receiving the leads and displacingr them relative to the core, devices engageable with the conductors adjacent the core, fluid pressure apparatuses respectively for moving the carrier relative to the bending mechanism, and for moving said devices relative to the conductors, control means including a valve and a handle movable in one direction to cause the carrier to advance toward the bending mechanism, a second valve for controlling the movements o said devices and operated automatically by the advancing of the carrier to cause the devices to advance toward the conductors, the movement ot said handle in the opposite direction causing the devices and carrier to be retracted, and means for operating the bending devices.

26. Apparatus for bending armature conductors comprising, in combination, a Work carrier for receiving an assembly ot' armature core and hairpin conductors, the ends of which extend beyond one end of the core tov provide leads, bending mechanism for receiving the leads and displacing them relative to the core, devices engageable with the conductors adjacent the core, power means for operating the bending mechanism, iuid pressure apparatuses respectively for moving the carrier relative to the bending mechanism and said devices relative to the conductors, means for controlling said pressure apparatuses and including valves and an operating handle and a sprin normally holding the handle in position tor causing the pressure apparatuses to maintain retracted the carrier and said devices, latch means released by movement of the handle into position for causingl the carrier to be advanced toward the mechanism, said latch holding the handle in said position in opposition to the spring, a second `valve operated automatically by the advancing of the carrier for causing said devices to be advanced toward the conductors, means responsive to the advancing of the carrier for causing the power means to operate the bending mechanism, and means responsive to the operation ot the power means for tripping the latch means to release said spring 1n order to restore the control means to normal condition whereby the carrier and said devices will be retracted automatically.

27. Apparatus for bending armature conductor leads, comprising in combination, a work carrier for receiving an assembly of an armature core a'nd conductors, the ends of which extend beyond one end of the core to provide leads, bending mechanism for receiving the leads and displacing them angularly relative to the core, and means for controlling the operation of the bending mechanism, said means being rendered operative automatically to ellect the operation of the bending mechanism in response to movement of the carrier toward the bend.- ing mechanism.

28. Apparatus for bending armature conductor leads, comprising in combination, a work Carrier for receiving an assembly of an armature core and conductors, the ends of which extend be ond one end ot' the core to provide leads, ending mechanism for receiving the leads and displacing them angularly relative to the core, means for retracting the carrier trom the bending mechanism, and means tor cont-rolling the operation of the carrier retracting means, said control means being rendered automaticall operative in response to operation oi the ending mechanism to move the carrier away from the bending mechanism after the bendin operation has been completed.

29. pparatus for bending armature conductor leads, comprising in combination, a work carrier for receiving an assembly of an armature core and conductors, the ends of which extend beyond lone end of the core to provide leads, bending mechanism for receiving the leads and displacing them.

angularly relative. to the core, devices for engaging the conductors adjacent the core, means for advancing said devices toward said conductors automatically in response to movement of the work carrier, toward the bemling mechanism, and means for operating the bending mechanism.

30. Apparatus for bending armature. conductor leads, comprising in combination, a work carrier for receiving an assembly of an armature core and conductors, the ends of which extend beyond one end of the core to provide leads, bending mechanism for receivin the leads and displacing them angulary relative to the core, devices for engaging the conductors adjacent the core` means for advancing said devices toward the conductors and means for operating the bending mechanism, both of said means operating automatically in response to movement of the Work carrier toward the bending mechanism.

3l. Apparatus for bending armature conductor leads, comprising in combination, a Work carrier for receiving an assembly of an armature core and conductors, the ends of which extend beyond one end of the core to provide leads, bending mechanism for receiving the leads and displacing them angularly relative to the core, devices for engaging the conductors adjacent the core, means for advancing said devices toward the conductors and means for operating the bending mechanism, both of said means operating automatically in response to movement of the work carrier toward the bending mechanism, and means for retracting the Work carrier, said means operating automatically in response to completion of bending operation and the retraction of said devices from the conductors.

3L. Apparatus for bending armature conductor leads, comprising in combination, means for supporting an assembly of an armature core and conductors, the ends of which extend beyond one end of the core to provide leads, bending mechanism for receiving the leads and for displacing them angularly relative to the core, devices for engaging the conductors adjacent the core, means for causing the bending operation to take place automatically in response to the movement ot' the devices toward the conductors, and thel retraction of the devices to take place automatically after the bending operation has been completed.

llll. Apparatus for bending arn'iature conductor leads, comprising in combination, means for supporting an assembly ot an armature core, and conductors the ends of which extend beyond one end of the core to provide leads, bending mechanism for receiving the leads and displacing them angularly relative to the core, devices for engaging the conductors adjacent the core,

and means for causing the retraction of said devices :trom the armature core to take place automatically after the bending operation luis been completed.

Ill. Apparatus tor bending armature conductor leads comprising. in combination, a work support l'or receiving an assembly of a slotted core and hairpin conductors, the ends of which emerge from one, end of the core and are located in concentric circular rows. two rotatable concentric bendingr members having recesses for receiving, respcc` tively, the conductor ends located in inner and outer rows, levers attached respectively to the bending members, a common reciprocatable member l'or engaging each of the levers and moving them each in one direction of their movement. and springs for moving the levers in the opposite direction.

35. Apparatus for bending arn'iature conductor leads comprising, in combination, a work snpliortI lor receiving an assembly of a slotted core and hairpin conductors, the ends ot; which emerge from one end of the core and are located in concentric circular rows, two rotatable concentric bending members having recesses for receiving, respectively, the conductor ends located in inner and outer rows, levers attached respectively to the bending members, a common operating member for moving the levers simultaneously each in one of the directions of its movennfnt, resilient means for moving the levers in other directions of their movement, and means for moving the bending members endwise during rotation thereo l, the common operating member permitting endwise nievement of the bending members during rotation thereof.

3G. Apparatus l'or bending armature conductor leads, comprising in combination, a work carrier l'or receiving an assembly of an armature core and conductors the ends of which extend bevond one end of the core to provide leads, bending mechanism for rccoiving the leads and displacing them angularly relative to the core2 devices for engaging the conductors adjacent the core, means for .advancing the work carrier toward the bending mechanism, means tor advancing said devices toward said conductors, means tor preventing the advancing of said devices toward the conductors until the Work carrier has been advanced toward thc bending meel anis-ni, and means for operating the bending mechanism.

3T. ,\pparat.us :tor bending armature conductor leads, comprising in combination, a. worlr carrier for receiving an assembly of an arniature core and conductors, the ends of which extend beyond one end of the core to provide leads, bending niechanism for receiving the leads and displacing them angularly relative to the core, devices for engaging the conductors adjacent the core,

means for advancing and retracting said devices relative to the conductors, means for advancing and retracting the work carrier relative to the bending mechanism, means for preventing the retracting of the work carrier from the bending mechanism until said conductor engaging devices have been retracted, and means for operating the bending mechanism. A

38. Apparatus for bending armature conductor leads, comprising in combination, a work carrier for receiving an assembly of an armature core and conductors, the ends of which extend beyond one end of the core to provide leads, bending mechanism for receiving the leads and displacing them angularly relative to the core, devices for engaging the conductors adjacent the core,

means for advancing and retracting the work carrier relative to the bending mechanism, means for advancing and retracting said devices relative to the conductors, means for preventing the advancing of said .conductor engaging devices until after the work carrier has been advanced toward the bending mechanism and for preventing the retraction of the Work carrier from the bending mechanism before said conductor engaging devices have been retracted, and means for operating the bending mechanism.

39. Apparatus for bending armature conductor leads, comprising in combination, a work carrier for receiving an assembly of an armature core and conductors, the ends of which extend beyond one end of the core to provide leads, bendin mechanism for re' ceiving the leads and c isplacing them angularly relative to the core, devices for engaging the conductors adjacent the core, means for advancing and retracting the work carrier relative to the bending mechanism, means for advancing and retracting said devices relative to the-conductors, and means for operating the bending mechanism.

40. Apparatus for bending armature leads according to claim 39 in combination with a control mechanism having a single manually operable member through which is effected the control of the means for the advancing and retracting of the Work carrier and means for advancing and retracting the conductor engaging devices.

In testimony whereof I hereto aix my signature.

GEORGE W. ELSEY. 

